Titre :

Seasonal patterns of growth, alginate content and block structure of the alien invader Sargassum muticum (Fucales, Ochrophyta) from the Atlantic coast of Morocco

Auteur(s) :

Belattmania, Zahira [Auteur]
Université Chouaib Doukkali [UCD]
El Atouani, Samir [Auteur]
Université Chouaib Doukkali [UCD]
Bentiss, Fouad [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Jama, Charafeddine [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Falace, Annalisa [Auteur]
Chaouti, Abdellatif [Auteur]
Université Chouaib Doukkali [UCD]
Reani, Abdeltif [Auteur]
Université Chouaib Doukkali [UCD]
Sabour, Brahim [Auteur]
Université Chouaib Doukkali [UCD]
Bentiss, Fouad [Auteur]

Titre de la revue :

Botanica Marina

Numéro :

65

Pagination :

69-78

Éditeur :

Walter de Gruyter GmbH

Date de publication :

2021-12-07

ISSN :

0006-8055

Mot(s)-clé(s) en anglais :

alginate
chemical characterisation
rheology
Sargassum muticum
seasonal variation

Discipline(s) HAL :

Chimie/Matériaux
Chimie/Polymères

Résumé en anglais : [en]

In the present study, alginate yield and composition were investigated during the seasonal life cycle of the alien brown alga Sargassum muticum harvested from the Atlantic coast of Morocco. Alginate yield ranged from 11.14% ...
Lire la suite >In the present study, alginate yield and composition were investigated during the seasonal life cycle of the alien brown alga Sargassum muticum harvested from the Atlantic coast of Morocco. Alginate yield ranged from 11.14% in winter to 25.62% in spring/early summer, coinciding with maximum vegetative growth. Monthly monitoring of the alginate block structure showed that the highest mannuronate (M)/guluronate (G) ratio was recorded during the maximum development of S. muticum, before sexual maturity and during resumption of vegetative growth, giving maximum flexibility to the alga. The unusually high molar monad fractions (FG) and dyad fractions (FGG) of guluronic acid in late summer/early autumn appeared to be related to stiffness of senescent thalli. Rheological characterisation showed that the alginate of S. muticum exhibited pseudoplastic behaviour, with the highest apparent viscosities measured in late summer/early autumn when the G blocks dominated the alginate structure. This study suggests that S. muticum could be exploited as an alginophyte for commercial applications. The best harvest time is May-June, which corresponds to the highest alginate yield, maximum thallus growth, and largely completed sexual reproduction, ensuring sustainable exploitation of the species.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Ingénierie des Systèmes Polymères

Date de dépôt :

2022-03-04T11:47:46Z
2022-03-05T10:49:59Z